Welding apparatus



May 13 1924. 1,493,656

E. J. VON HENKE WELDING APPARATUS Filed Oct. 20. 1921 II/IIIIIIIII 4Patented May 13, 1924.

v UNITED STATES I a 1,493,656 PATENT OFFICE.

EDMUND J. VON HENKE, OF CHICAGO, ILLINOIS.

WELDING AIPAEA'IUB.

To all who'mit may concern:

Be it known that I, EDMUND J. VON.

' HENKE, a citizen of the United States, residing at Chicago, in thecounty of Cook and State of Illinois, have invented anew and usefulImprovement in Welding Apparatus, of WhlCh the following is a full,clear,

and exact description.

,My invention relatesto welding apparatus and particularly to suchapparatus for butt welding.

An object of my invention is such a device which is simple inconstruction and eflicient in operation.

A further object of my inventionis such a device wherein a singlewelding circuit is used and in which a cumulative efiect is roduced bytwo or more transformers, with individual primary coils but with thecommon secondary consisting of th e/above welding circuit.

A further object of my invention is such 7 an arrangement of t esetransformers wherein'the particles called fiash'thrown off by thewelding are permitted to fall downwardly withoutencountering any part ofthe transformers. A

A furtl ie r object of my invention ssuch an arrangement ofIcircuitswherein the welding circuit is of minimum resist-- ance resulting in anincreased efliciency of the machine; also by havin a number oftransformers, each of which as to deliver but a part of the secondaryvoltage a considerable saving is accomplished in the magnetic materialused for core by virtue of the decreased length of the mean magneticcircuit.

My invention will be better understood by reference to the accompanyingdrawings which represent more or less diagrammatically machineembodying-my invention and in which:

Figure 1 shows a cross sectional viewof an apparatus embodying myinvention;

Figure 2 shows a section on 'line II-II of Figure 1;

Figure 3 shows a sectional view of a machine embodying a modification ofmy invention; and

' F i re 4 shows a section'on line Iv -IV- of Figure 3. 7

The machine comprises platens 1 and 2, each of which is provided with awork holder 3. The platen 2 is movableto and from the platen 1 by means'of' a hand wheel 4 at-.

Application am October 20, ,1a'21. sci-1.1 Re. scams.

tached to a screw 5., The screw 5 passes through a support 19 whichprevents the longitudinal movement of the screw. Any other suitablemeans may be used for roducin the com ression well known by t osefamiliar with t eart.

The platens 1 and 2 are provided with an extension 6 and 7,respectively. The core 8 of the transformer surrounds the extension 7and a coil 9 surrounds one leg of the transformer core ,8; A similar.core 10 surrounds the extension 6 and a coil 11 surrounds one leg ofthecore 10. The coils 9 and 11 can be connected either in multiple orseries to a source of supply of alternating current. The extensions 6and 7, are connected together by-a. flexible electrical conductor 12usually made of copper ribbons. The ends ofthe conductor 12 are boltedto the extensions-6 and 7 b bolts 13. The extensions 6 and 7 prefe ra lyhave a. cross section as. shown in Flgure 2. These two extensions andthe arrangement of the coils thereon are identical.

Extending downwardly from the laten 1' is an apron 14 attached to theplaten y bolts 4 15. Extending downwardly from the platen 2 isanapron'16 attached tovthe platen by rote'cting the transformers by Figure1, however, in that the flexible conductor 12" is rovided with lugs 20and the ends of the exible conductors 12 are attached respectively tothe platens 1 and 2 by means of bolts 21 or other suitable means.Furthermore, the transformer coils 9 and 11 surround their respectivecores 8 and 10" in the manner shown in. Figure 4. As in the arrangementof Figure 1 the transform er coils are fed from any suitable source ofalternating current.

The operation of my device is as follows l I The work is clamped in theholders 3 so that there is a slight distance between the endsof-thework-pieces. The pressure device is then made to move the platen 2to bring the work-pieces together. The current turned on thetrans-formers and an inpressure in the ordinary way. During thisoperation there is ordinarily a considerable amount of scale and otherparticles known comes necessary} to operate 'them"from a p pa yp ec r' utg is aniib a nectingthetwoftransformers in' open; Y on either athree-phase or a; two phase 1 circuit, 1 thus insteadof the whole loa'done phase and badlyiunbalancing thep'oly' phase system i the load" willbe distributed i While 1 have shown and two embodiments of my inventionin "det ail, I;

" in the details as flash thrown" ofi from the welding joint.

Such material in my "machine passes downwardly between thejapronsfl land 16 into the"channel.18 anddoes not come into con tact with any'other portion of the machine. 'Thetrans'former connectionsfmay be modi-'I p l platens together lied to suit" 'condition's.' It sometimes becoming off of among the; various-'phases.fl'j H M invention 'has'niany"other advantages? *resu ting from the con structionshow'n and.

' er coll operating upon each extension, and means between saidtransformer and a verti "calf linepassing through the welding point,

described.

desireit to be understoodthat I am nfot'to be limited to the arrangementshownand deef scribed,- as many "modificationsin'ay, be made withoutdeparting from the p 5 thecombination'of two platens, means on spirit ofmy"'invention. j Iclaimf '1. In a device of the 1 thecombination ofplatens, means for clamping the work on each platen, means connect toforma singleingsuch means together I weldin circuit and twotransformersacting to pro me a cumulative voltage in the weldingcircuit. I p 2. In a device of-the character the combination of meansfor holding the work-pieces. The weld is and means for welding point.

supporting do e y r secondaryfcircuit, an extension line throughcharacter described,

described,

1,4es,ese

work to bewelded, a welding circuit including saidmeans, and a pluralityof transformers connected so that their voltage acts cumulatively uponthe said welding circuit for heating the work to welding temperature.

3. In a device of the character described, the combination of means forholding the work to be welded, a Welding circuit including" said means aplurality of transformers connected so that their voltage actscumulatively upon the said welding circuit for heatingthe work toproducing pressure at the a device offthe character described, the comthe workto be welded, means for sai eans electrically connecting saidforming a single secondary two transformer'pr maries operm v n other,

ir u t an ating uponsaid. means for p'roducinga cumuhave voltagein saidsecondary, -circuit.

QVICG, of. the character "described,

5, In a the fcombin'ation' of two" platens, means on each platen forholding thew'orkto be weldwelding temperature,

platents relatively to each bination of platens and means for ed'fsaidmeansbeingconnected to .form a p H underneath andf'removed' from avertical the welding point, a transformeachfplaten,

for protectin 'the'transformer from the flash and-"inoten particles Qresulting from welding."

6. In a device of the character described,

"each platen for holding) the work' to he weld- "ed, neans extendingextensions and the article to be welded.

In testimony whereof I have hereunto set my hand.

conductor,

:l n J. vow Hana.

